ISOPRO®
Introduction
Introduction
Energy saving regulations (EnEv) stipulate that structures must be planned and executed such that thermal
bridges are either avoided or reduced. The technically approved ISOPRO® thermal insulation elements are
ideally suited for this purpose.

6

The connecting elements consist of an insulating
Neopor® body with structural rebar inserts to reliably transfer forces. The combination of B500B and
B500NR rebars reliably eradicates corrosion problems and reduces heat flow within the rebars to a
minimum.
With an insulation thickness of 80 mm, ISOPRO®
solves thermal bridge problems in its tried and tested way and exceeds by far the minimum thermal
insulation requirements.
Thanks to our clearly presented range, the most

suitable element for any given connection situation
is quickly found. Cantilever slabs and supported
components are only a few examples of structural
problems that can be easily solved using ISOPRO®
thermal insulation elements.
Their excellent insulating properties solve problems in building physics such as condensing water
and mould growth at the external/internal concrete
component interface.

The ISOPRO® test certificates are available at
www.h-bau.de
for downloading.

www

e
d
.
u
a
.h-b

Click...

* NEOPOR® is a registered trademark of BASF, Ludwigshafen

7
ISOPRO® – insulating to the highest standard

ISOPRO®
Building physics – thermal insulation
The thermal bridge
When calculating a building's heat demand for the
verification required by the energy saving regulations (EnEV), thermal bridges must be taken into
account. Thermal bridges are weak spots in the
building's thermal transfer envelope, which lead to
locally enhanced heat losses compared to standard
components.
Geometrical thermal bridges are differentiated on
one side, where the heat flow from the inner surface is juxtaposed with a larger external surface
(e.g. external building corners), and on the other
side by material thermal bridges, where thermal
bridges are caused by fittings or changes in materials.
Thermal bridges are differentiated by cause into:
Ŷ Material (substance) thermal bridges
Ŷ Geometrical thermal bridges
Ŷ Environmental thermal bridges*
Ŷ Mass flux thermal bridges*

Fig. 1: Schematic representation of heat loss

An example of a material thermal bridge is the penetration of external walls by reinforced concrete
components. At lower outside temperatures this
increased heat flow leads to a drop in the surface
temperature on the inside of the wall.
In regions where these low surface temperatures

are prevalent - in particular in fine capillary spaces
- the moisture contained in the moist, warm air of
the room can condense and lead to mould growth
on the component surface.

Fig. 2: Material (substance) thermal bridge

Fig. 3: Geometrical thermal bridge

* Environmental and mass flux thermal bridges are not discussed further in the "Building physics – thermal insulation" section.

8

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ISOPRO®
Building physics – thermal insulation
Effects of thermal bridges
Thermal bridges are engineering weak spots in the
structure.
A thermal bridge displays a particularly high heat
flux, so that the surface temperature on the inside
of external components drops rapidly due to the locally enhanced heat loss.
Effect of a thermal bridge

During the heating period in particular, this leads to
the temperature falling below the dew point, and
surface or capillary condensation forming at these
points.
The foundation for the formation and growth of
mould is laid.
Consequences
Ŷ Increase in rel. humidity

The balcony thermal bridge:
A balcony in the form of a reinforced concrete cantilever slab is the classic example of a thermal bridge.
If a thermally conductive reinforced concrete slab
penetrates the building's thermal insulation as a
cast-in-one-piece concrete balcony, the combination of material and large balcony surface area radiates heat to atmosphere similar to a cooling fin.
The result is pronounced cooling of the room floors
and frequent mould and moisture damage. The
same also applies to models with continuous reinforcement and locally made-up insulation.
Where ISOPRO® insulation elements are used, thermal bridges are reduced to a minimum when connecting to reinforced concrete slabs on buildings.

The balcony slab is thermally isolated by the structurally and thermally optimised balcony insulation
element and insulates the transition zone optimally
and economically.
ISOPRO® consists of an insulating Neopor® body
with structural rebar inserts to reliably transfer forces. The combination of B500B and B500NR rebars
reliably eradicates corrosion problems and reduces
heat flow within the rebars to a minimum.

Fig. 1: Balcony with reinforced concrete slab cast in one piece

Fig. 2: Balcony with thermally isolated, reinforced concrete slab

9
ISOPRO® – insulating to the highest standard

ISOPRO®
Building physics – thermal insulation
Humidity
The proportion of water vapour in the gaseous mixture (in this case: in a room) is referred to as the
humidity. The commonest measure of humidity is
relative humidity, given in percent and reflecting
the ratio of the current water vapour content of the
air in a room to the saturation level. At lower temperatures the ability to store water is lower than
at higher temperatures. For example, a cubic metre
of air at 10 °C can accept a maximum of 9.41 g of
water.
The same volume of air at 30 °C can accept up to
30.38 g of water. We refer to the saturation concentration.
Due to changing temperatures the relative humidity in a room varies for the same quantity of absorbed water. Because the air cools on the surface
in the region of the thermal bridge the relative humidity in this region increases until finally it reaches
the saturation concentration.
Together with the ambient temperature, humidity
influences a person's feeling of comfort.

The dew point
The temperature at which the water in the air is sufficient for water vapour saturation (relative humidity of 100%) is referred to as the dew point, because
if the temperature falls further any excess moisture
condenses from the air as dew. This dew then settles
on colder surfaces, for example.

The higher the temperature and relative humidity
of the air in the room, the higher is the dew point
and therefore the higher is the risk of condensation on colder component surfaces. An indoor air
climate of 20 °C and 50% relative humidity is usually assumed. Under these conditions the dew point
is at 9.3 °C.

Not only moisture deposits on components and the
associated damage to the structure present a hazard, but also mould growth in these areas and the
resulting health hazard.
Mould growth does not occur after condensation
only, but begins once the relative humidity at the
surface reaches more than 80%, as a result of the
low surface temperature. The non-critical surface
temperature for a normal room climate is 12.6 °C.
If this surface temperature is achieved at all points
of the component, it is regarded as risk free.

70

75

80

85

90

ISOPRO®
Building physics – thermal insulation
Three-dimensional thermal bridge analysis in accordance with DIN EN ISO 10211
In order to meet a building's energy and climate
quality demands, it is necessary to determine the
transmission heat losses.
This comprises:
Ŷ determination of the U values of standard components;
Ŷ determination of the losses through linear and
point thermal bridges.
Thermal bridges are classified as follows:
Thermal bridge

Analysis of a thermal bridge in accordance with DIN EN ISO 6946:2008-04
– No two-dimensional analysis method for cantilever balcony slabs
The standard DIN EN ISO 6946 "Building components and building components - Thermal resistance
and thermal transmittance - Calculation method"
1 Application
This international standard specifies the method for
calculating the thermal resistance and the thermal
transmittance of structural components and components. This does not include doors, windows and
other glazed units, curtain façades, structural components in contact with the ground and ventilation
elements.
The calculation method is based on the thermal conductivity and thermal resistance design values of the
materials and products used for the respective application.
The method applies to structural components and
elements consisting of thermally homogeneous layers (which may also include layers of air).
This standard also presents approximation methods
for components consisting of heterogeneous layers. The effect of mechanical securing elements is
covered by the correction factor given in Annex D.
Other cases, where the thermal insulation is penetrated by a metallic layer, are beyond the scope of
this standard.
Source: DIN EN ISO 6946:2008-04, Section 1

Caution:
The standard DIN EN ISO 6946:2008-04 may not
be adopted for mathematical consideration of
the cantilever reinforced concrete slab form of
thermal bridge as required by the energy saving
regulation (EnEV) calculations. It excludes structures with thermal insulation and penetrating
metallic layers, e.g. tension or shear bars in balcony insulation elements.

11
ISOPRO® – insulating to the highest standard

ISOPRO®
Building physics – thermal insulation
Balcony thermal bridge – energy saving regulations analysis
Thermal bridges can be considered mathematically in line with the energy saving regulations in three different ways:
Method 1

Method 2

Method 3

Description

The building's thermal bridges
are not analysed individually
and are not executed in accordance with DIN 4108 Suppl. 2

The building's thermal bridges
conform to DIN 4108 Suppl. 2

The thermal bridges are calculated in detail and analysed
to DIN V 4108-6:2003-06, in conjunction with additional current
best practice regulations (DIN
EN ISO 10211)

Analysis

No further analyses

Controlled in the balcony insulation element approvals

Analysed using detailed, threedimensional thermal
bridge analysis

Using

Across the board
'UWB = 0.10 W/(m²K)

Across the board
'UWB = 0.05 W/(m²K)

Detailed:
HT = ∑ Ui ∙ Ai ∙ Fx,i + ∑ \i ∙ li ∙ Fx,i +
∑ Fi ∙ Fx,i

Note:
Never mix the individual analysis methods.
On method 1:
All thermal bridges are covered by an across-theboard thermal bridge surcharge of 'UWB = 0.10 W/
(m²K) for the entire heat-transmitting, enveloping
On method 2:
All thermal bridges are covered by the across-theboard thermal bridge surcharge of 'UWB = 0.05 W/
(m²K) for the entire heat-transmitting, enveloping
surface area, if all thermal bridges conform to DIN
4108 Suppl. 2:2006-03.
The balcony thermal bridge case is controlled by
DIN 4108 Suppl. 2:2006-03, Figure 70. This confirmation of conformity means that no additional analyses are required.
If the reduced, across-the-board thermal bridge
surcharge 'UWB = 0.05 W/(m²K) is adopted, thermal equality is given for all balcony slab insulation
elements with a minimum insulation thickness of

surface area.
No further analyses are required.

50 mm, analogous to Figure 70, DIN 4108 Suppl. 2.
This method is used in practice in almost all cases.

Note:
Ŷ Thermally isolated structures that correspond at least to the specified construction (Figure 70) are used.
Ŷ Products corresponding to this construction are regarded as thermally equal products to DIN 4108.
Ŷ The suitability for purpose of the balcony insulation elements in accordance with DIN 4108 Suppl.
2:2006-03, Figure 70 is controlled in the respective approvals.
Ŷ The balcony insulation elements ISOPRO® and ISOMAXX® meet the demands of DIN 4108, Supplement 2, as noted in approvals Z-15.7-243 and Z-15.7-244.

Ŷ The temperature factor fRSi ≥ 0.7 must be adhered
to in order to rule out any condensation and associated mould growth hazard during normal
residential use.

The thermal bridge loss coefficients \ and the temperature factors fRSi ≥ 0.7 are therefore determined
for all of a building's thermal bridges and taken
into account in the analysis. The requirement for
adopting this method is that the thermal bridge loss
coefficients per unit length \(psi) of all connection
details are analysed on a project-specific basis.

The point (F) thermal bridge loss coefficients are
usually ignored in the energy savings regulations
analysis. Recurring point influences (wall plugs in
composite thermal insulation systems) are already
taken into account in the U values of the standard
components.
Mixed analyses using method 3 and the across-theboard methods 1 and 2 is not allowed!

Quotient of heat flux in the steady-state and the
product of length and temperature difference
between the ambient temperatures on each side
of the thermal bridge (definition from DIN EN ISO
10211).
The thermal transmittance per unit length is the
variable that describes the influence of a linear
thermal bridge on the overall heat flux. This is required for the continuous balcony insulation elements ISOPRO® IP, IPT and IPQ, for example.

Quotient of heat flux in the steady-state and the
temperature difference between the ambient
temperatures on each side of the thermal bridge
(definition from DIN EN ISO 10211).
The point thermal transmittance is the variable
that describes the influence of a point thermal
bridge on the overall heat flux. This is required
for the point balcony insulation elements ISOPRO® IPQS, ISOPRO® SK and ISOPRO® IPA, for example.

13
ISOPRO® – insulating to the highest standard

ISOPRO®
Building physics – thermal insulation
Verification of freedom from mould
Thermal bridges should be designed such that the
inner surface temperature at the most unfavourable point lies above the critical temperature of
12.6 °C.
If all surface temperatures of a residential room are
above 12.6 °C (corresponds to an assumed humidity of 80% at the component surface to DIN EN ISO
13788 and DIN 4108-2,2001-03), no mould can form
during usual residential use.

Section 6 of DIN 4108-2 specifies the minimum requirements for thermal insulation on thermal bridges
and demands adherence to the temperature factor fRSi ≥ 0.7, and the internal surface temperature Tsi ≥
12.6 °C.
Internal surface temperature Tsi
The internal surface temperature in the region of
a thermal bridge Tsi must reach a value of at least
12.6 °C.
DIN 4108-2 stipulates an internal air temperature of
20 °C and an external air temperature of -5 °C to
achieve this.

Temperature factor fRSi
The temperature factor fRSi is the difference between the temperature on the internal surface Tsi
of an component and the external air temperature
Te, relative to the temperature difference between
the internal air Ti and the external air Te.

Ŷ Determine action effects using linear-elastic apNote:
If the stiffnesses along the edge of the slab vary greatly (e.g. supports along the slab edge and no continuous wall), the balcony slab should not be considered as a separate system to the building. In this
case a hinge line should be defined along the balcony slab edge using the stiffnesses given above. The
ISOPRO® elements can be determined by way of the joint forces.

0.3 · VRd,max = 151.8 kN/m > 43.5 kN/m = maxVEd
t Structural integrity is verified!
Note:
The limitation of the maximum slab bearing capacity is not generally the governing factor. If it does become the governing factor, it is the structural designer's duty to suitably adapt the input data listed in
the above calculation.

19
ISOPRO® – insulating to the highest standard

ISOPRO®
Design program ISOPRO® DESIGN
Design program ISOPRO® DESIGN
With the design program ISOPRO® DESIGN, we pass
on to you our many years of experience in the design of our ISOPRO® thermal insulation elements for
the the commonest balcony systems.
A range of common balcony systems such as cantilever balcony, supported balcony, loggia, internal corner balcony and external corner balcony may be selected, or work with free input if the loading design
values are known. After entering the geometrical

data and the acting loads the appropriate ISOPRO®
elements can be selected.
The areas and geometrical parameters of the ISOPRO® elements can be examined for feasibility in
the plan and section, and be printed as required as
a formwork diagram, or be exported for additional
processing in *.dxf format.

Technical service telephone
Our experienced engineering applications staff are at your side with expert support
and will help you solve specific application problems relating to thermal insulation
elements.

The ISOPRO® elements consist of
80 mm thick Neopor® insulation.
The U value of this body is 0.031
W/(m²K).

Ŷ Quick and inexpensive installation

The loads are transferred across
the insulation joint by a statically
acting framework. The framework consists of reinforcement
steel and any concrete pressure
pads. The steel in the joints consists of stainless steel.

Application
The ISOPRO® Type IP and IPT elements are balcony insulation
elements for free cantilever concrete components.
The elements transfer negative
bending moments and positive
shear forces.
The cantilever elements are supplemented by the short elements
ISOPRO® Type IPH for point horizontal forces and ISOPRO® Type
IPE for point horizontal forces
and moments. The short elements may only be used in conjunction with IP and IPT cantilever slab connections.

Notes:
Ŷ See pages 17–19 for balcony slab design principles.
Ŷ The shear resistance of the slab must be limited to 0.3 VRd,max in accordance with the approval. This must
be analysed by the structural designer. See the design principles on page 19 for details.
Ŷ The balcony slab must be cambered commensurate with the prevalent deformations. See pages 38–39.
Ŷ If long balcony slabs are used the expansion joint centres given in Table S. 40 must be adhered to.

Notes:
Ŷ See pages 17–19 for balcony slab design principles.
Ŷ The shear resistance of the slab must be limited to 0.3 VRd,max in accordance with the approval. This must
be analysed by the structural designer. See the design principles on page 19 for details.
Ŷ The balcony slab must be cambered commensurate with the prevalent deformations. See pages 38–39.
Ŷ If long balcony slabs are used the expansion joint centres given in Table S. 40 must be adhered to.

Ŷ Insert the DIN EN 1992-1 balcony edging d
and connect using the ISOPRO® tension bars.
The ISOPRO® tension bars and the bearing reinforcement are at the same height. The connector in the tension bar plane may be severed
if required.

c

b

Balcony

Floor

d

d

d
a

Floor

A

Balcony

d

c

b

a

A

Concrete ≥ 25/30

Ŷ Install and align ISOPRO® IP. Note the direction
of installation (arrow marking on the top of the
element).

Ŷ Install spacer bars e 1 Ø 8 top and bottom respectively.
Ŷ For indirect support install edging on the floor
side d to DIN EN 1992-1 and spacer bars e Ø 8.
Ŷ Insert upper slab reinforcement d and connect
with the ISOPRO® tensions bars. The ISOPRO®
tension bars and the bearing reinforcement are
at the same height.
Ŷ When concreting the ISOPRO® elements, both
sides should be uniformly poured and compacted to ensure they remain fixed in position.

Concrete ≥ 20/25

Balcony
®

ISOPRO Type IP with site lattice girder
The lattice girder replaces the hanger reinforcement. It is installed at a distance ≤ 100 mm to the insulation and is led up to directly below the tension
reinforcement. The diameter of the diagonals must
be at least 5 mm. The shear bar may be positioned
above or below the lattice girder.

Indirect support
The required steel cross-section per meter of hanger
reinforcement can be taken from the table:

IP 10 Q...

IP 15 Q...

IP 20 Q...

IP 25 Q...

IP 30 Q...

IP 40 Q...

IP 45 Q...

IP 50 Q...

IP 60 Q...

C25/30
floor &
balcony

Q12
C20/25
floor
C25/30
balcony

C20/25
floor
C25/30
balcony

Q10
C25/30
floor &
balcony

Q8
C20/25
floor
C25/30
balcony

Type

C25/30
floor &
balcony

C20/25
floor
C25/30
balcony

Standard

C25/30
floor &
balcony

Hanger reinforcement is required on the floor side,
designed for VRd . At least 2 Ø 8 spacer bars are arranged on the vertical face.

as,req [cm²/m]

0.80

0.80

1.84

2.13

2.14

2.49

2.87

3.35

Used

4Ø6

4Ø6

4Ø8

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 12

as,req [cm²/m]

0.80

0.80

1.84

2.13

2.14

2.49

2.87

3.35

Used

4Ø6

4Ø6

4Ø8

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 12

as,req [cm²/m]

1.00

1.00

1.84

2.13

2.14

2.49

2.87

3.35

Used

4Ø6

4Ø6

4Ø8

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 12

as,req [cm²/m]

1.00

1.00

1.84

2.13

2.14

2.49

2.87

3.35

Used

4Ø6

4Ø6

4Ø8

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 12

as,req [cm²/m]

1.00

1.00

1.84

2.13

2.14

2.49

2.87

3.35

Used

4Ø6

4Ø6

4Ø8

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 12

as,req [cm²/m]

1.00

1.00

1.84

2.13

2.14

2.49

2.87

3.35

Used

4Ø6

4Ø6

4Ø8

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 12

as,req [cm²/m]

1.00

1.00

1.84

2.13

2.14

2.49

2.87

3.35

Used

4Ø6

4Ø6

4Ø8

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 12

as,req [cm²/m]

1.00

1.00

1.84

2.13

2.14

2.49

2.87

3.35

Used

4Ø6

4Ø6

4Ø8

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 12

as,req [cm²/m]

1.00

1.00

1.84

2.13

2.14

2.49

2.87

3.35

Used

4Ø6

4Ø6

4Ø8

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 10

4 Ø 12

33
ISOPRO® – insulating to the highest standard

ISOPRO® Type IPT
Site reinforcement and installation notes

Balcony

Floor

d Upper reinforcement

Section A - A
Integrated hanger reinforcement

ISOPRO® tension bars

d

ISOPRO® Type IPT

b Edging to DIN

b
a
ISOPRO® shear bars

Balcony

a Lower reinforcement
ISOPRO® pressure plate

c Spacer bars Ø 8

Floor

a

a

Balcony

Floor

b

Installation notes
Ŷ Install and align ISOPRO® IPT. Note the direction of installation (arrow marking on the top
of the element).
Ŷ Install the lower reinforcement c for the floor
and balcony slabs.
Ŷ Insert the DIN EN 1992-1 balcony edging d
and connect using the ISOPRO® tension bars.
The ISOPRO® tension bars and the bearing reinforcement are at the same height. The connector in the tension bar plane may be severed
if required.

c

Balcony

Floor

Ŷ Install spacer bars e 1 Ø 8 top and bottom respectively.

d

d

Ŷ For indirect support install edging on the floor
side d to DIN EN 1992-1 and spacer bars e Ø 8.
Ŷ Insert upper slab reinforcement f and connect
with the ISOPRO® tensions bars. The ISOPRO®
tension bars and the bearing reinforcement are
at the same height.

d

b

d

c
a

a

A

Concrete ≥ 25/30

34

Floor

A

Balcony

www.h-bau.de

Concrete ≥ 20/25

Ŷ When concreting the ISOPRO® elements, both
sides should be uniformly poured and compacted to ensure they remain fixed in position.

All ISOPRO® elements in the type series' IP and IPT are available in a two-part design!

General information
Ŷ The allowable action effects can be taken from
the tables on pages 26–29 of this technical information sheet.
Ŷ Both 20 mm and 40 mm make-up sections are
available for height equalisation.
Ŷ Type IP: If lattice girders are arranged at a distance ≤ 100 mm from the insulation joint, no additional hanger reinforcement is necessary. If not,
hanger reinforcement designed for VRd must be
arranged along the insulation joint.
Ŷ Information on the necessary extra formwork
height and the maximum expansion joint centres
can be found on pages 38–40.
Ŷ The labels (type designation) on the upper and
lower parts must be identical. Note the information on the respective balcony and floor sides.

36

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The following elements are also colour-coded:

Type
IP 20

Code colour
green

IP 30

blue

IP 40

yellow

IP 50

white

The continuous colour-coding allows foolproof
matching, including for short sections.

Caution:
The type designation on the upper and lower sections must be identical (also see colour coding). The
installation direction (balcony side) must be adhered to.

37
ISOPRO® – insulating to the highest standard

ISOPRO® Type IP, IPT
Deflection and excess height
Slab deformation
To determine the vertical deflection of the balcony
slab the deformation of the cantilever slab connection is superimposed with the deformation resulting
from the curvature of the slab to DIN EN 1992-1-1
and DIN EN 1992-1-1/NA. We recommend performing an analysis of the serviceability limit state (qua-

si-permanent load case combination).
The balcony slab must be heightened commensurate with the determined deformation. It should be
noted that the results are rounded up or down depending on the planned direction of drainage.

This results in the following maximum cantilever arm lengths:
Concrete
cover

Max. l [m] as a function of element height h [mm]
160

170

180

190

200

210

220

230

240

250

cv 30 mm

1.75

1.89

2.03

2.17

2.31

2.45

2.59

2.73

2.87

3.01

cv 35 mm

1.68

1.82

1.96

2.10

2.24

2.38

2.52

2.66

2.80

2.94

cv 40 mm

1.61

1.75

1.89

2.03

2.17

2.31

2.45

2.59

2.73

2.87

cv 45 mm

1.54

1.68

1.82

1.96

2.10

2.24

2.38

2.52

2.66

2.80

cv 50 mm

1.47

1.61

1.75

1.89

2.03

2.17

2.31

2.45

2.59

2.73

39
ISOPRO® – insulating to the highest standard

ISOPRO® Type IP, IPT
Expansion joint centres

ISOPRO® expansion joint centres
In the outermost concrete components, expansion joints perpendicular to the insulation layer must be used
to limit stresses resulting from temperature differentials. The joint centres e can be taken from the table
below:
Expansion joint centres e

ISOPRO® IP Eck corner elements
Where it is structurally necessary to arrange the ISOPRO® balcony insulation elements around corners, special ISOPRO® IP corner elements are used. They are used as supplements to the linear ISOPRO® IP and IPT
elements.

ISOPRO® Type IPH
Technical principles
The ISOPRO® Type IPH elements for transferring horizontal forces may only be used in conjunction with
ISOPRO® cantilever slab or shear force connections.
The number of IPH elements used depends on the
information provided by the structural designer.
Follow the information provided on page 40 with

regard to the configuration of expansion joints.
When using ISOPRO® Type IPH elements it should
be noted that the force transfer through the linear
connection is reduced by the percentage length of
the IPH elements compared to the total connection
length.

IPH 3 for transferring horizontal forces parallel and perpendicular to the insulation joint

Design table Type IPH for concrete t C20/25
Reinforcement
Shear force

Horizontal

Element length
[mm]

HRd «« [kN]

ZRdA [kN]

IPH 1

2x1Ø8

-

100

± 7.4 kN

-

IPH 2

-

1 Ø 10

100

-

± 18.1 kN

IPH 3

2x1Ø8

1 Ø 10

100

± 7.4 kN

± 18.1 kN

Type

Site reinforcement
The ISOPRO® IPH elements are installed analogous
to installation of the ISOPRO® cantilever slab or
shear force connections. The number and position

of the elements depends on the structural analysis
data. The elements must be fixed in their positions.

45
ISOPRO® – insulating to the highest standard

ISOPRO® Type IPE
Technical principles
The ISOPRO® Type IPE elements for transferring horizontal forces parallel and perpendicular to the insulation plane may only be used in conjunction with
ISOPRO® cantilever slab or shear force connections.
Moments, e.g. resulting from seismic actions, can
only be transferred in conjunction with the ISOPRO®
Type IP, IPT elements.
The number of IPE elements used depends on the

information provided by the structural designer.
Follow the information provided on page 40 with
regard to the configuration of expansion joints.
When using ISOPRO® Type IPE elements it should
be noted that the force transfer through the linear
connection is reduced by the percentage length of
the IPE elements compared to the total connection
length.

Ŷ Install and align ISOPRO® IPQ. Note the direction
of installation (arrow marking on the top of the
element).
Ŷ Insert balcony hanger reinforcement d (see table)
and connect to ISOPRO® shear bars. The ISOPRO®
shear bars and the bearing reinforcement are at
the same height.

Ŷ When concreting the ISOPRO® elements, both
sides should be uniformly poured and compacted
to ensure they remain fixed in position.
Note:
Analysis of the shear resistance of the slabs without
shear reinforcement is performed to DIN EN 19921, Para. 10.3.3. Analysis of the shear resistance of
the slabs with shear reinforcement is performed
to DIN EN 1992-1, Para. 10.3.4. The maximum shear
force transferable via the joint must be limited to 0.3
· VRd,max.

Site hanger reinforcement
Type IPQ

as,req [cm²/m]

Used

IPQ 10

0.80

4Ø6

IPQ 20

1.00

IPQ 30

1.20

IPQ 40
IPQ 50

Type IPQ

as,req [cm²/m]

Used

IPQ 70

2.13

6Ø8

5Ø6

IPQ 80

2.84

8Ø8

6Ø6

IPQ 90

3.33

6 Ø 10

1.60

8Ø6

IPQ 100

3.95

5 Ø 12

2.00

4Ø8

IPQ 110

4.80

6 Ø 12

53
ISOPRO® – insulating to the highest standard

ISOPRO® Type IPQS
Site reinforcement and installation notes

Balcony

Floor

d Upper reinforcement

Section A - A
Site hanger reinforcement

d

a

a

b U bars
b

a
ISOPRO shear bars

Balcony

a Lower reinforcement
ISOPRO compression bars

c Spacer bars Ø 8

Floor

Installation
ISOPRO® Type IPQS

Ŷ Install the lower reinforcement c for the floor
and balcony slabs.

Balcony

Floor

b

Ŷ Install and align ISOPRO® IPQS. Note the direction
of installation (arrow marking on the top of the
element).
Ŷ Insert balcony hanger reinforcement d (see table)
and connect to ISOPRO® shear bars. The ISOPRO®
shear bars and the bearing reinforcement are at
the same height.

Note:
Analysis of the shear resistance of the slabs without
shear reinforcement is performed to DIN EN 19921, Para. 10.3.3. Analysis of the shear resistance of
the slabs with shear reinforcement is performed
to DIN EN 1992-1, Para. 10.3.4. The maximum shear
force transferable via the joint must be limited to 0.3
· VRd,max.

Site hanger reinforcement
Type IPQ

54

As,req [cm²]

Used

IPQS 10

0.71

2Ø8

IPQS 20

1.07

IPQS 30
IPQS 40
IPQS 50

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Type IPQ

As,req [cm²]

Used

IPQS 60

1.60

2 Ø 12

3Ø8

IPQS 70

2.35

3 Ø 12

1.42

4Ø8

IPQS 80

2.18

2 Ø 14

1.11

2 Ø 10

IPQS 90

3.26

3 Ø 14

1.66

3 Ø 10

ISOPRO® Type IPQZ
Site reinforcement
Installation notes
Ŷ For tension-free support of an IPQZ, an IPQS element should be counterposed.

Ŷ The IPQS requires site stirrup reinforcement to anchor back the tie bar to thed floor.

Ŷ A tie bar is located between the two elementsc.
The diameter and number of bars corresponds to
the IPQS and IPQZ elements, see table.

Ŷ The required hanger reinforcement and the site
slab reinforcement are not shown here.

Ŷ Install and align ISOPRO® IPQQ. Note the direction of installation (arrow marking on the top of
the element).
Ŷ Insert balcony hanger reinforcement d (see table)
and connect to ISOPRO® shear bars. The ISOPRO®
shear bars and the bearing reinforcement are at
the same height.

Note:
Analysis of the shear resistance of the slabs without
shear reinforcement is performed to DIN EN 19921, Para. 10.3.3. Analysis of the shear resistance of
the slabs with shear reinforcement is performed
to DIN EN 1992-1, Para. 10.3.4. The maximum shear
force transferable via the joint must be limited to 0.3
· VRd,max.

Site hanger reinforcement
Type IPQQ

58

as,req [cm²/m]

Used

as,req [cm²/m]

Used

IPQQ 10

0.80

4Ø6

IPQQ 70

2.13

6Ø8

IPQQ 30

1.20

6Ø6

IPQQ 90

3.33

6 Ø 10

IPQQ 40

1.60

8Ø6

IPQQ 110

4.80

6 Ø 12

IPQQ 50

2.00

4Ø8

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Type IPQQ

ISOPRO® Type IPQQS
Site reinforcement and installation notes

Balcony

Floor

d Upper reinforcement

Section A - A
Site hanger reinforcement

d

a

a

b U bars
b

a
ISOPRO® shear bars

Balcony

a Lower reinforcement
ISOPRO® compression bars

c Spacer bars Ø 8

Floor

Installation

ISOPRO® Type IPQQS

Ŷ Install the lower reinforcement c for the floor
and balcony slabs.

Balcony

Floor

c

Ŷ Install and align ISOPRO® IPQQS. Note the direction of installation (arrow marking on the top of
the element).
Ŷ Insert balcony hanger reinforcement d (see table)
and connect to ISOPRO® shear bars. The ISOPRO®
shear bars and the bearing reinforcement are at
the same height.

Note:
Analysis of the shear resistance of the slabs without
shear reinforcement is performed to DIN EN 19921, Para. 10.3.3. Analysis of the shear resistance of
the slabs with shear reinforcement is performed
to DIN EN 1992-1, Para. 10.3.4. The maximum shear
force transferable via the joint must be limited to 0.3
· VRd,max.

Ŷ Insert upper slab f reinforcement.
Ŷ When concreting the ISOPRO® elements, both
sides should be uniformly poured and compacted
to ensure they remain fixed in position.
Floor

A

Balcony

d

d

Note:
c b

a

a
Concrete ≥ 20/25

A

Concrete ≥ 25/30

Analysis of the shear resistance of the slabs without
shear reinforcement is performed to DIN EN 19921, Para. 10.3.3. Analysis of the shear resistance of
the slabs with shear reinforcement is performed
to DIN EN 1992-1, Para. 10.3.4. The maximum shear
force transferable via the joint must be limited to 0.3
· VRd,max.

Ŷ Install ISOPRO® elements Type IPO. Centres in line with structural requirements.
Ŷ Install upper floor reinforcement e and
connect to the ISOPRO® element reinforcement.
Ŷ Install the site insulation between the
ISOPRO® elements.
Ŷ Install bracket reinforcement f and
edging g and connect to the ISOPRO®
elements. Floor edge beams are designed
as continuous beams.
Ŷ Pour brackets and floor slab together if
possible. Ensure that no movement can
occur.

The ISOPRO Type IPW and IPS
elements are thermally insulating and load bearing connecting
elements for vertical wall slabs or
brackets.
Depending on type they transfer
both positive and negative shear
forces, as well as bending moments, and vertical and horizontal shear forces.

Moments from wind loads are transferred by the
bracing effect of the balcony slabs.
MRdz = 0
Overlapping lengths are determined using composite zone II. If required, the anchorage lengths can
also be dimensioned for composite zone I. Designs
and dimensions deviating from the standard elements are available on request.

1250

Lowersection

Tension bars

ZL

80

322

Centre section

Uppersection

ZL

Shear bar, horizontal

322

W all, inner

W all, outer

322

DL

DL

80

Balcony slab

Floor slab

Element allocations
Type

IPW 1

IPW 2

IPW 3

IPW 4

Element height [m]

t1.50

t1.50

t1.50

t1.50

Tension bars

2 Ø 12

2 Ø 12

4 Ø 12

4 Ø 12

Shear bars Qz

6Ø6

10 Ø 6

8Ø8

10 Ø 8

Shear bars Qy

2x2Ø6

2x2Ø6

2x2Ø6

2x2Ø6

4 Ø 12

4 Ø 12

6 Ø 12

6 Ø 14

Compression bars

Design table for concrete ≥ C20/25
MRdy [kNm]
Type
IPW 1

78

Height
≥ 1.50 m

Height
≥ 1.75 m

Height
≥ 2.00 m

Height
≥ 2.25 m

Height
≥ 2.50 m

Height
≥ 2.75 m

Height
≥ 3.00 m

VRdz [kN]

VRdz [kN]

62.3

73.7

85.2

96.6

108.0

119.4

130.9

36.0

± 10.9

IPW 2

79.8

94.5

109.1

123.7

138.4

153.0

167.6

63.5

± 10.9

IPW 3

115.2

137.1

159.1

181.0

202.9

224.9

246.8

99.5

± 10.9

IPW 4

153.8

183.0

212.3

241.6

270.9

300.2

329.4

143.9

± 10.9

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ISOPRO® Type IPW
Site reinforcement and installation notes

Balcony slab

Concrete ≥ 25/30

e Connecting reinforcement

f Connecting reinforcement

as per structural analysis

as per structural analysis

Rein
fo

rcem
ent

Ŷ Starting at the bottom, install the individual ISOPRO® elements Type IPW and
connect to the wall d reinforcement.

Ŷ Install the outer wall reinforcement
c, structural edging e, vertical spacer
bars f and connecting reinforcement
g according to the structural engineer's
instructions and connect to the ISOPRO®
elements.
Ŷ Particular care should be taken when
concreting to ensure the elements remain in position.
Ŷ We recommend uniformly pouring and
compacting both wall slabs